Constraints on anisotropic properties of the universe in $f(Q,T)$ gravity theory

Abstract

Motivated by anomalies in cosmic microwave background observations, we investigate the implications of $f(Q,T)$ gravity in Bianchi type-I spacetime, aiming to characterize the universe's spatially homogeneous and anisotropic properties. By using a linear combination of non-metricity $Q$ and the energy-momentum tensor trace $T$, we parametrize the deceleration parameter and derive the Hubble solution, which we then impose in the Friedmann equations of $f(Q,T)$ gravity. Bayesian analysis is employed to find the best-fit values of model parameters, with $1-\sigma$ and $2-\sigma$ contour plots illustrating the constraints from observational data, including $H(z)$ data and the Pantheon+ sample. Our analysis reveals a transition from a decelerated to an accelerated expansion phase, with the present deceleration parameter indicating an accelerating universe. The energy density gradually decreases over time, approaching zero for the present and future, indicating continuous expansion. The anisotropic pressure, initially notably negative, transitions to slightly negative values, suggesting the presence of dark energy. The evolving equation of state parameter $\omega$ exhibits behavior akin to phantom energy, influenced by spacetime anisotropy. Violations of the null energy condition and the strong energy condition imply phantom-like behavior and accelerated expansion.

Journal of High Energy Astrophysics accepted version

References in corpus (41)

• f(R,T) gravity
• Improved Cosmological Constraints from New, Old and Combined Supernova Datasets
• Spectra and Light Curves of Six Type Ia Supernovae at 0.511 < z < 1.12 and the Union2 Compilation
• Disappearing cosmological constant in f(R) gravity
• The Pantheon+ Analysis: The Full Dataset and Light-Curve Release
• Cosmological viability of f(R)-gravity as an ideal fluid and its compatibility with a matter dominated phase
• $f(Q,T)$ gravity
• Hubble parameter measurement constraints on the redshift of the deceleration-acceleration transition, dynamical dark energy, and space curvature
• Large Scale Structure as a Probe of Gravitational Slip
• Cosmological solutions and growth index of matter perturbations in $f(Q)$ gravity
• Solar system and equivalence principle constraints on f(R) gravity by chameleon approach
• From inflation to dark energy in the non-minimal modified gravity
• Cosmological Solutions of $f(T)$ Gravity
• The simplest non-minimal matter-geometry coupling in the $f(R,T)$ cosmology
• Probing cosmic isotropy with a new X-ray galaxy cluster sample through the $L_{\text{X}}-T$ scaling relation
• Anisotropic Universe Models in f(T) Gravity
• Cosmic acceleration with bulk viscosity in modified $f(Q)$ gravity
• Baryogenesis in $f(Q,\mathcal{T})$ Gravity
• Anisotropic nature of space-time in $f(Q)$ gravity
• Cosmological Perturbation Theory in $f(Q,T)$ Gravity
• Observational constraints on two cosmological models of $f(Q)$ theory
• Cosmic acceleration and energy conditions in $\Lambda$CDM symmetric teleparallel $f(Q)$ gravity
• Cosmological Inflation in f(Q, T) Gravity
• Isotropization of locally rotationally symmetric Bianchi-I universe in $f(Q)$-gravity
• A new parametrization of Hubble parameter in $f(Q)$ gravity
• Late-time acceleration in $f\left(Q\right)$ gravity: Analysis and constraints in an anisotropic background
• Static spherically symmetric wormholes in $f(Q,T)$ gravity
• Constant sound speed and its thermodynamical interpretation in $f(Q)$ gravity
• Accelerating Universe scenario in anisotropic $f\left(Q\right)$ cosmology
• Investigating the dark energy phenomenon in $f(R,L_m)$ cosmological models with observational constraints
• Low-lying doubly heavy baryons: Regge relation and mass scaling
• Quintessence Universe and cosmic acceleration in $f(Q,T)$ gravity
• Geodesic Deviation Equation In $f(Q)$-Gravity
• Late-time cosmology in $f(Q,L_m)$ gravity: Analytical solutions and observational fits
• Viscous Dark Energy In Bianchi Type V Space-Time
• Constrained evolution of effective equation of state parameter in non-linear $f(R,L_m)$ dark energy model: Insights from Bayesian analysis of cosmic chronometers and Pantheon samples
• Cosmological implications of the constant jerk parameter in $f(Q,T)$ gravity theory
• Constraining the $f(R,T)=R+2\lambda T$ cosmological model using recent observational data
• Anisotropic Universe in $f(Q,T)$ gravity, a novel study
• Modeling cosmic acceleration with a generalized varying deceleration parameter
• A comprehensive parametrization approach for the Hubble parameter in scalar field dark energy models

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• Bulk viscous matter in $f(T)$ gravity: A path to cosmic acceleration
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